Hyperparathyroidism is usually diagnosed with blood tests. The blood tests will check the levels of parathyroid hormone and calcium in your blood. Blood tests usually need to be repeated at least once to confirm the results. You may also need to have an ultrasound scan of your neck. If you have a tumour on your parathyroid glands, you will need to have blood tests and some scans. You may also need to have a biopsy. This means that a small sample of cells will be taken from the tumour, usually with a needle and examined under a microscope.
Attribution: BUPA